Since you asked for a possible build, here's the one I am currently running for my Nebula. It's a variation of Cygone's Nebula build, but that and his Intrepid build thread have been pushed down a lot of pages. My build averages 4-5k raw dps, with a net dps running anywhere between 2.3k-3.5k dps. Your damage will increase dramatically based on teammates and timing. So here it is:
Proper Solitude
Stations
Commander Science Station: Hazard Emitters I, Scramble Sensors I, Gravity Well I, Photonic Shockwave III
Lt. Commander Engineering Station: EP2W I, EP2S II, Extend Shields I/Aceton Beam I
Lt. Universal (Eng) Station: EP2W I, EP2S II
Lt. Tactical Station: Tactical Team I, Torpedo Spread II
Ensign Science Station: Transfer Shield Strength I or Polarize Hull I or Tachyon Beam I
Consoles
Engineering: Borg Console, Neutronium Alloy Mk XI Rare, Nadeon Detonator/Vent Theta/RCS
Science: 3x Particle Generator Mk XII Rare, Field Generator Mk XII VRare
Tactical: Tetryon Pulse Generator Mk XI Rare, Photon Detonation Assembly Mk XI Rare
Weaponry
Fore: 2x Photon Torpedo Launchers Mk XII [Borg], 1x Phased Tetryon Dual Beam Bank Mk XI
Aft: 3x Tetryon Turrets Mk XII [Borg]
Devices
Deuterium Surplus, Subspace Field Modulator, Engine Battery
Doffs
(Note: all are purple quality)
2x Projectile Officers
1x Conn Officer affecting Tactical Team cooldown
1x Gravimetric Scientist
1x Photonic Studies Scientist
This allows you to cycle Tac Team I more frequently; you may drop it for another Photonic Doff if you feel Tac Team isn't good enough to warrant a Doff.
Skill Build
http://www.stoacademy.com/tools/skil...uild=Citadel_0
Tactics
This build is the ultimate in jack-of-all-trades craft, and does so with style. Depending on your team and situation, you can easily swap out Boffs to obtain the powers that work best for the mission. I prefer running with Transfer and Extend, though, since I usually solo the transports in Blockade; with the recent changes to tetryon weaponry, I can still run low weapons power during Blockade (to maximize Aux power for wells/heals) and still strip shields enough to effectively utilize my torpedoes.
The main point of this build is to be opportunistic while lobbing a steady stream of damage at your enemies. Nadeon Detonator, which grants you Photonic Shockwave Torpedo, is great when paired with gravity well against those pesky enemies with evasive maneuvers. Hit the well and fire the special torp at the same time, and watch with glee as their engines are knocked offline and are dragged into the well. Throw in a scramble sensors against Klingon NPCs and laugh as they throw all their special powers against one another. Nothing beats an enemy debuffing itself for you, after all!
When I said your damage is based off of timing, I truthfully mean it. The Nebula is not a fast craft, but it is fast enough to bring its weaponry to bear--Deuterium Surplus, Evasive Maneuvers, and an Engine Battery all help you keep mobile during battle as well. Once an enemy has a shield face down, pummel it relentlessly with your torpedoes. And as for timing + teammates, my fleeties have learned one valuable lesson when flying with me: when the gravity well pulls in a mob, strip shields and watch as my PSW III hits for 15k+ on each enemy. PSW III is straight kinetic damage, so only fire it off for damage when the enemy's shields are down. And, with this skill build above, you won't push them far away like Repulsors will. Then again, I rarely fire off PSW III without a gravity well in the first place.
Keep in mind, however, that I am an engineer captain, so I can make good use of EPS Transfer. Then again, I hardly ever use Nadion Inversion or Miracle Worker...the ship is simply too tough to warrant its use. I'm sure a tac or sci captain can do even more damage than I can with this setup. And again, this build uses Cygone's wonderful Nebula guide, so I give all of this credit to him.